57439564 has 36 divisors (see below), whose sum is σ = 125930784. Its totient is φ = 22722336.

The previous prime is 57439553. The next prime is 57439567. The reversal of 57439564 is 46593475.

It is a self number, because there is not a number n which added to its sum of digits gives 57439564.

It is not an unprimeable number, because it can be changed into a prime (57439567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8724 + ... + 13819.

Almost surely, 2^57439564 is an apocalyptic number.

It is an amenable number.

57439564 is an abundant number, since it is smaller than the sum of its proper divisors (68491220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57439564 is a wasteful number, since it uses less digits than its factorization.

57439564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22574 (or 22565 counting only the distinct ones).

The product of its digits is 453600, while the sum is 43.

The square root of 57439564 is about 7578.8893645441. The cubic root of 57439564 is about 385.8368573285.

The spelling of 57439564 in words is "fifty-seven million, four hundred thirty-nine thousand, five hundred sixty-four".